...but reader Bob is going to say: "Opposite of Kudos" to me for not knowing my shizz:

If we're going to be picky about punctuation, I should point out that the diacritical mark in naïve is not an umlaut--it is a dieresis. The two marks look the same but an umlaut is used to change a vowel to give it a "front" pronunciation, as in Führer. A dieresis indicates that a vowel which one might assume is silent should be pronounced distinctly in its own syllable, as is the case in naïve. The mark doesn't change the pronunciation of the "i"; it simply indicates that it should be separated from the "a".